584 SAXIFRAGACEiE. Lithophragma. 



lated. Capsule 1-celled, with 3 parietal many-seeded placentae, 3-valved at 

 the apex. Seeds horizontal, ovate, with a distinct raphe ; (he testa smooth 

 and memhranaceous. — Small and slender herbs (natives of Oregon and Cali- 

 fornia), annual or perennial ? with fibrous at length grumous roots, and 

 lobed or divided leaves. Cauline leaves few, commonly alternate : petioles 

 stipuliform at the base. Racemes simple, few-flowered : pedicels erect in 

 fruit. Bracts minute. Petals rose-color or nearly white, mostly rather 

 large for the size of the flower. 



§ 1. Petals 3-cleft or 3-lobed. — Lithophragma, Nutt. mss. (Tellima § 

 Lithofragma, Nutt. in jour. acad. I. c. partly.) 



* Calyx mostly cyathiform, adherent to the lower part of the ovary. 



1. L. parviflora (Nutt.): canescenlly hirsute; leaves temately divided or 

 parted, the segments 3-cleft ; raceme at first short, elongated in fruit ; calyx 

 cyathiform, attenuate into the short pedicel ; petals much exserted, deeply 

 3-cleft. — Nutt.! in jour. acad. Philad. I. c. Tellima parviflora. Hook. ! jl. 

 Bor.-Am. 1. p. 239, t. 78, A. T. (Litliophragma) parvifolia. Hook. &^' Am. ! 

 hot. Beechey, suppi. p. 346. 



/?. ? micrantha : mucli smaller ; flowers nearly sessile : petals (pale rose- 

 color) scarcely exserted. — L. micrantha, Nutt. mss. 



Woods and stony places, Oregon, Douglas! Dr. Scouler ! Nuttall! 

 N. California, Menzies, ex Hook. 0. Dry hills on the Flat-head River, near 

 the Rocky Mountains, Nuttall. May-June. — Stems 8-12 inches high, 

 simple. Cauline leaves 1-2, similar to the radical ones, or sometimes less 

 divided, petioled. Pedicels in fruit about the length of the clavate-obconic 

 calyx. Petals rather large, deep rose-color. — This species has larger flowers 

 than any other of the genus. We have not seen the L. micrantha of Nut- 

 tall, which from the description seems to be only a smaller-flowered variety. 



2. L. glabra (Nutt. ! mss.) : " nearly glabrous ; leaves reniform-cordate, 

 3-parted ; the segments 3-lobed at the apex, tiie lateral ones often 2-cleft ; 

 raceme elongated ; pedicels much longer than the campanulate pubescent 

 calyx ; petals equally 3-cleft, longer than the calyx. 



" Blue Mountains of the Oregon. July-Aug. — Stem slender, about 10 

 inches high. Raceme few- (3-6-) flowered : pedicels nearly half an inch 

 long. Calyx as broad as long." Nuttall. 



* * Calyx campanulate, free from the ovary. 



3. L. tenella (Nutt. ! mss.) ; " scabrous-puberulent ; leaves 3-5-lobed, 

 somewhat cuneiform, the lobes toothed ; cauline ones minute, 3-cleft ; ra- 

 ceme few- (3-6-) flowered ; pedicels about the length of the obconical calyx ; 

 petals equally 3-cleft, rather longer than the calyx. 



" In the central range of the Rocky Mountains, on the banks of the Big 

 Sandy and Siskadee Rivers of the Colorado of the West, about lat. 42°. 

 June-July. — A diminutive species, 4-5 inches high. Leaves and flowers 

 small. Teeth of the calyx short." Nuttall. — This species, we find, has the 

 calyx wholly free from the ovary, as in L. heterophylla. 



4. L. heterophjlla (Hook. & Arn.) : scabrous-hirsute ; radical leaves cor- 

 date, somewhat 3-5-lobed, crenate ; cauline ones deeply 3-5-lobed, the 

 lobes mostly cleft ; raceme elongated ; pedicels very short ; caljTc short, 

 broadly campanulate ; petals much exserted, 3-cleft at the summit ; ovary 



